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import { Parser } from "./index.ts";import { IParser, OnParse } from "./interfaces.ts";
export class MappedAParser<A, B, B2> implements IParser<A, B2> {  constructor(    readonly parent: Parser<A, B>,    readonly map: (value: B) => B2,    readonly mappingName = map.name,    readonly description = {      name: "Mapped",      children: [parent],      extras: [mappingName],    } as const,  ) {}  parse<C, D>(a: A, onParse: OnParse<A, B2, C, D>): C | D {    const map = this.map;    const result = this.parent.enumParsed(a);    if ("error" in result) {      return onParse.invalid(result.error);    }
    return onParse.parsed(map(result.value));  }}